材料科学
复合材料
热导率
环氧树脂
复合数
扫描电子显微镜
粒径
镍
粒子(生态学)
冶金
海洋学
地质学
物理化学
化学
作者
Jin Zhao,Fangyi Liang,Wenzhong Lü,Jinhang Dai,Shunliang Meng,Zihang Lin
出处
期刊:Polymers
[MDPI AG]
日期:2019-12-02
卷期号:11 (12): 1990-1990
被引量:9
标识
DOI:10.3390/polym11121990
摘要
Magnetically oriented three-phase composite systems of epoxy resin, aluminum nitride, and nickel have been prepared, the thermal conductivity of composites filled with nickel powder with different particle sizes and content under different applied magnetic fields was studied. The vibrating scanning magnetometer (VSM) and scanning electron microscopy (SEM) were applied to investigate the dispersion of nickel powder in the composites. The results showed that the anisotropic thermal conductivity of the composites treated by applied magnetic field forming chain structure is obtained. The epoxy resin-based composites filled with 30 vol% aluminum nitride with particle size of 1 μm and 2 vol% nickel powder with particle size of 1 μm and aligned with vertical magnetic field have the highest thermal conductivity (1.474 W/mk), which increases the thermal conductivity of the composites by 737% and 58% compared to the pure epoxy resin (0.2 W/mk) and the composites filled with 30 vol% aluminum nitride (0.933 W/mk). In addition, we simulated the influence of nickel powder particles with different particle sizes and arrangements on the thermal conductivity of the composite material in COMSOL Multiphysics software, and the results were consistent with the experimental results.
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